Automatic paper-straightening attachment for adding machines



Jan. 3, 1928. 1,654,946

c. M. SINKS AUTOMATIC PAPER STRAIGHTENING ATTACHMENT FOR ADDING MACHINESFiled May 12. 1927 2 Sheets-Sheet 2 i j i ins l6 FIGS INVENTOR.

Patented Jan. 3, 1928.

UNITED STATES CHARLES M. SINKS, OF NEAR UNION, OHIO.

AUTOMATIC PAPEB-STRAIGHTENING arracnmnnr ron. ADDING mamas.

Application filed May 12,

. This invent-ion relates to new and useful improvements in automaticpaper straightening attachments for adding machines.

It is the principal object of my invention to provide for convenientattachment to any adding machine a device for automaticallystraightening the paper strip that isv used in said machines. Atpresent, the paper strip which issues from said machines, especiallywhen the roll becomes small, is so curled as to make it diflicult toread or preserve, without straightening it upon a desk or other object.This straightening method often results in the paper strip being torn intwo. My attachment for adding machines, which is simple in constructionand easy to apply to them, automatically straightens the paper stripbefore it is printed upon, so that when it issues from the machine, itwill be absolutely free from curls.

It is another object of my invention to revent the accidental spinningof the paper from the roll out upon the floor.

In the accompanying drawings illustrating my invention, Figure 1 is aplan view of my automatic paper straightening attachment for addingmachines. Figure 2 is a right-hand, side elevation of said attachment,showing a small roll of paper mounted therein. Figure 3 is a rear,elevational view of said attachment. And Figure 4 is a side, elevationalview of said attachment, showing a new or large roll of paper mountedtherein, the straightening bar being shown in dot and dash lines for itsloading position.

Referring to the accompanying drawings for a detailed description of myinvention, the numeral 1 designates an adding machine of a conventionaltype to which there is removably secured by screwes 2 a carrier frame 3.This frame preferably consists of two met al side portions 4, 4 whichhave the curved contour shown in Figurs 2 and 4, being joined at theirlower front' ends by an integral plate portion 5. Formed in the rear endof one side portion 4 is a hole adapted to receive one end of a paperroll shaft 6, the other end of which terminates in a reduced threadedportion 7 adapted to be screwed in a threaded hole in the rear end ofthe other side portion 4 of the frame. On its first named end there issecured to said shaft 6 a knob 8 by means of which it may be easilyturned to screw it into and out of the threaded hole in the lastmentioned side member 4. (See Figures 1 and 3). Mount- 1927. Serial No.190,774.

ed on the shaft 6 is a roll of paper 9 for use 111 the adding machine 1to which the frame 3 is attached. This paper roll is held against theright side member 4 by a slide bar 10. This bar is preferably square incross section, as shown in dotted lines in F1gure 2 and is slidablelaterally through a hole 1n that side member 4 which contains thethreaded hole that receives the threaded end 7 of the shaft 6. Securedto the inner end of the bar 10 is a bifurcated retaining piece 11, whichstraddles the shaft 6 for engagement with the inner face of the pa erroll 8. Secured to the outer part of sai side 4 1s a horizontallyprojecting 'U-shaped guide 12, through holes in whose upwardly roectmgportions the bar 10 is movable. See Figures 1 and 3). Secured tothe-outer end of the bar 10 beyond the guide 12 is a knob 13 by whichsaid bar may be pressed inwardly against the paper roll or withdrawntherefrom. Secured to the bottom of the U-shaped guide 12. by a rivet 14is a flat spring 15 whose free end yieldingly engages the bar 10 to holdit in an adjusted position near or against the paper roll 9.

Formed in the middle portion of the right slde member 4 is a hole whichreceives one end of a shaft 16, the other end of which is of reduceddiameter and threaded for entrance into a hole formed in the middleportion of the other side member 4. Applied to the threaded end of thisshaft beyond the last mentioned side member, is a nut 17. Pivotallymounted upon the reduced part of the shaft 16 against the shoulderformed by the end of the enlarged portion of said shaft, is a curved arm18 which projects rearwardly under the middle portion of the paper roll9. Pivotally secured to the outer end of this arm 18 is a rubber roller19 whlch engages the paper roll 9, as shown in Figures 2 and 4, totension it.

Also pivotally secured upon the reduced portion of the shaft 16, betweenthe arm 18 and the left side member 4, is a U-shaped member 20. Theinner end of this U-shaped member 20 is secured to the inner end of thearm 18. To the outer end of this U- shaped member 20 there is securedone end of an arched member 21 which projects over a roller 22 mountedon a shaft 23 secured between the side members 4, 4 in front of, andparallel with, the shaft 16. The inner end of the arched member 21 ispivotall mounted on the reduced portion of the sha 16 and terminates atits outer end in a horizontal scraper bar 24 that is below and parallelwith the roller 22. (See Figures 1 and 3 The arm 18 is held in contactwith the paper by a spring 25 coiled around the reduced part of theshaft 16. One end of this spring is secured in a hole in said shaft,while its outer end is bent over the U-shaped member 20, whereby thepull exerted by said spring upon said U-shaped member will urge the arm,to which it is attached, toward the paper. The pull exerted by thespring upon the U-shaped member 20 will also hold the scraper againstthe paper which passes over the roller 22, to straighten it. The tensionof the spring 25, is adjusted-by turning the shaft 16, which, at itsouter end, is formed with a diametric groove 26 to receive ascrew-driver for this purpose.

In operation a paper roll is mounted upon the shaft 6, after which thebar 10 is moved inwardly to bring the bifurcated member 11 to a ositionto hold said roll against the right side member 4. The paper 27 is thendrawn from the top of the roll over the roller 22 and under the scraperbar 24, as shown-in Figure 4. It will be observed from Figure 4 how easyit is to slip the edge of the paper into position over the roller 22during the loading operation, since the straightening bar 24 may beeasily swung back and out of the way to its loading position shown indot and dash lines in said figure. The paper strip 27 is then drawn overan idler roller 28 and around an impression roller 29 in the addingmachine 1.

After the paper strip passes the roller 22, it is sharply engaged by thestraightening bar 24 which removes any curl that may exist in it. As theroll 9 decreases in di ameter, the curl becomes more pronounced; butthis is automatically compensated for by the increasing acuteness of theangle at which the straightening bar 24 engages it. This increasingacute angle is due to the inward movement of the tension arm 18, whichis permitted by the gradually decreas ing diameter of the roll 9 whenthe paper is drawn from it.

It is thus seen that I have provided a simple and efficient automaticpaper straightening attachment for adding machines.

I do not wish to be limited to the details of construction andarrangement herein shown and described, and any changes or modificationsmay be made therein within the scope of the subjoined claims.

Having described my invention, I claim:

1. A paper straightening attachment for adding machines, comprising apaper roll supporting frame, a tension member adapted to engage saidroll, a transverse member over which a paper strip from said roll isadapted to pass, and a straightening means adapted to engage said paperstrip from above after it has passed over said transverse member.

2. A paper straightening attachment for adding machines, comprising apaper roll supporting frame, a tension member adapted to engage saidroll, a roller over which a paper strip from said roll is adapted topass, a straightening member, and automatic means for simultaneouslypressing the ten* sion member against said roll and the straighteningmember upon the paper strip after it has passed over said roller.

3. A paper straightening attachment for adding machines, comprising apaper roll supporting frame, a transverse shaft in said frame in frontof said roll, a tension arm mounted on said shaft for engagement withthe under surface of said roll, a. roller mounted in said frame in frontof said shaft and over which a paper strip from said roll passes, astraightening member also mounted on said shaft and projecting over-theroller, and spring means on said shaft for simultaneously holding thetension arm against the paper roll and the straightening member tightlyupon the paper strip after it has passed, over said roller, for thepurpose specified.

4. A paper straightening attachment for adding machines, comprismg apaper roll supporting frame, a transverse shaft in said frame in frontof said roll, a tension arm mounted on said shaft for enga ement withtheunder surface of said ro a roller mounted in said frame in front of saidshaft and over which a paper strip from said roll passes, astraightening member also mounted on said shaft and projecting over saidroller for engagement with the paper strip, means pivotally secured onsaid shaft for connectmg said tension arm and the straightening member,and a spring surrounding said shaft, one end of said spring beingsecured to the shaft and its other end to the connecting member for thepurpose specified.

A paper straightening attachment for adding machines, comprising a paperroll supporting frame, a transverse shaft in said frame in front of saidroll, a tension arm mounted on said shaft for engagement with the undersurface of said roll, a roller mounted in said frame in front of saidshaft and over which a paper strip from said roll passes, an archedmember mounted at one end on said shaft and projecting over said roller,a transverse straightening bar on said arched member for engagement withthe paper strip after it has passed over said roller, a U-shaped membermounted on said shaft and connected at one end to the tension arm andatits other end to the arched member, and a spring surrounding .saidshaft and connected at one end to the shaft and at its other end to theU-shaped connecting member for the purpose specified.

6. A paper roll supporting frame comprising two side members and atransverse connecting member, a shaft mounted between said side membersto support a paper roll, a retaining slide passing through one sidemember for engagement with one face of said roll, a U-shaped guidesecured to said side member, and through whose right- 1 angled ends theslide passes, and a flat spring secured at one end to the U-shaped guideand engaging with its free end the slide for the purpose specified.

In testimony whereof I have hereunto set 15 my hand this 11th day. ofMay, 1927.

CHARLES M. SINKS.

